Wrong. Which union do you mean? The union that Lincoln claims created the states? Georgia was not included in the Articles of Association. All the original 13 states seceded from the Articles of Confederation & Perpetual Union..
No state has ever been out of the Union. (from your #787)
See above. Also North Carolina was out of the union for 9 months, Rhode Island & Providence Plantations was out of the union for over a year.
No state has ever been out of the Union for an instant since the Articles of Confederation were passed. (from your #789)
Wrong. Your "instant" lasted about as long as the "perpetual" union. Additionally, the Confederate states were out of the union for years - they were readmitted to the union via ratifying the 13th Amendment, then kicked out for refusing to ratify the 14th, only to be readmitted again when illegal military governments were instituted.
The words "secede" and "seceded" were terms of a later generation. The framers knew that the Constitution made the perpetual Union of the Articles more perfect, just as it says in the Preamble.
You know it too.
Walt